Whitehorse SD ZIP Code
Whitehorse city is located in South Dakota State, Dewey County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Whitehorse SD zip code by its streets and block numbers if we have some of the Whitehorse streets loaded in our website
Whitehorse Area Code is 605 and Time Zone is Mountain (GMT -07:00).
Whitehorse Zip Code - South Dakota
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Whitehorse City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Whitehorse ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Whitehorse, South Dakota.
The Whitehorse Zip Code is 57661.
If you want to send a mail to Whitehorse City, you should use the 57661 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Whitehorse ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", or "add ons". A ZIP+4 code uses the basic 57661 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Whitehorse city block, a group of apartments, an individual high-volume receiver of mail or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery in South Dakota.